Credit: Credit: John Bulava, Barbara Cid-Mora, Andrew D. Hanlon, Ben Hörz, Daniel Mohler, Colin Morningstar, Joseph Moscoso, Amy Nicholson, Fernando Romero-Lopez, Sarah Skinner, and Andre Walker-Loud.
Representation of the magnitude of the elastic πΣ hadron scattering amplitude showing the double-pole structure that suggests the hadron has a pair of resonances at 1380 megaelectronvolts (MeV) and 1405 MeV, not just one at 1405 MeV.